Fix rh-basic title

[dmartinol]

Wrong in docs/plugins.jon:

  "rh-basic": {
    "title": "agentic skill pack for Red Hat customers"
  },

Expected in docs/collections/rh-basic.html:

                    <h1 class="collection-page-title">Basic Agentic Collection</h1>
                    <p class="collection-page-sub">Essential Red Hat skills for IT professionals: CVE explanation, diagnostics, product lifecycle, RHEL patch planning, and...</p>

Also fix all the other references